I'm not sure you can find a way to interest them in visiting you.
Perhaps you could focusing on finding ways to show your interest in them. Call them on holidays or other times, ask how they are doing, if they have plans for the occasion, how education or work is going (depending on their ages) and other easy to talk about items.
Maybe, if you can, coordinate with their Mother to visit once in a while during key times. For example, if they are about to start a school year there will most likely be clothing and supplies that are needed. Be sure to set a small limit, worked out in advance, and make it an occasion to offer a bit of support and stay in touch personally.
As others have noted it is difficult to provide a good answer without some idea of ages. If your kids have moved out on their own then things are going to be different.
Anyhow, if you make the effort to stay involved in their lives and demonstrate your care and concern you stand a much better chance of having your children return that effort -- though of course during young adulthood they may drift away for a time. Whatever you do focus on them and not on what you can provide for them or they will get the wrong message.
I'm divorced and have split custody myself. However, I'm lucky in that my ex and I live close together and the kids alternate where they are staying on a weekly basis. Having a peaceful and respectful relationship with your ex is helpful. That is something else than might be repaired with apology and long term demonstrated respect in the event that there is a rough past or residual distrust.